Who invented erasable ink?

Answer Frank A. Muller applied for a patent for "initially erasable ink composition for a ball point writing instrument" in March of 1981. Muller's patent was published in May of 1982, making it the first... Read More »

Top Q&A For: Who invented erasable ink

What is the name of the erasable writing tablet?

The Etch A Sketch, manufactured by the Ohio Art Company, is perhaps the most popular erasable writing tablet . Ohio Art recently released two new products, the Etch A Sketch freestyle and the Etch ... Read More »

Who invented invented the vacuum cleaner?

The first upright vacuum cleaner was invented by a janitor in Canton, Ohio- James Spangler in 1907. On June 2, 1908, he received US Patent Number 889,823 for a Carpet Sweeper and Cleaner.

Who invented pickleball&what year was it invented?

Pickleball was invented in 1965 by Joel Pritchard and Bill Bell. The court included a badminton net that had been lowered to a height of 36 inches. A plastic ball was used along with paddles that w... Read More »

Who invented the bullet train and when was it invented?

Japan's "Bullet Train" was developed by Dr. Hideo Shima (1901 - 1998). Dr. Shima began investigations in 1948 and in 1958 it was decided to go ahead with a new line which followed the Tokaido road... Read More »